JPS5836448U - Microcomputer reset circuit - Google Patents
Microcomputer reset circuitInfo
- Publication number
- JPS5836448U JPS5836448U JP12755681U JP12755681U JPS5836448U JP S5836448 U JPS5836448 U JP S5836448U JP 12755681 U JP12755681 U JP 12755681U JP 12755681 U JP12755681 U JP 12755681U JP S5836448 U JPS5836448 U JP S5836448U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- oscillation
- input
- output
- reset circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Debugging And Monitoring (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
゛ 第１図は従来から知られているマイコンの自動リセ
ット回路の回路図、第２図は第１図の動作を示すタイム
チャート、第３図は本考案の実施例の自動リセット回路
の回路図、第４図は第３図の動作を示すタイムチャート
である。
なお図面に用いられている符号で、１・・・・・・ＣＰ
Ｕ、９・・・・・・検出回路、１０・・・・・・発振回
路、１１．１２・・・・・・ナントゲートである。゛ Fig. 1 is a circuit diagram of a conventionally known automatic reset circuit of a microcomputer, Fig. 2 is a time chart showing the operation of Fig. 1, and Fig. 3 is a circuit diagram of an automatic reset circuit of an embodiment of the present invention. , FIG. 4 is a time chart showing the operation of FIG. 3. In addition, the codes used in the drawings are 1...CP
U, 9...Detection circuit, 10...Oscillation circuit, 11.12...Nands gate.
Claims (1)
２つのナンド機能素子が縦列接続され、その接続点から
一方の素子の入力に帰還する発振用時定数回路及び他方
の素子の出力から上記一方の素子の入力に帰還するシュ
ミットトリガ用帰還回路が夫々設けられている発振回路
とを夫々具備し、上記検出回路の出力を上記発振回路の
２つのナンド機能素子の夫々の入力に与えてこの発振回
路をオン・オフ制御し、上記クリア出力信号が欠如した
とき、上記発振器が起動され、その発振出力が上記ＣＰ
Ｕのリセット入力に与えられるように構成したマイクロ
コンピュータのリセット回路。a detection circuit that detects the presence or absence of a clear output signal of the CPU;
Two NAND functional elements are connected in series, and each includes an oscillation time constant circuit that feeds back from the connection point to the input of one of the elements, and a Schmitt trigger feedback circuit that feeds back from the output of the other element to the input of the one element. an oscillation circuit provided therein, the output of the detection circuit is applied to each input of two NAND function elements of the oscillation circuit to control on/off of the oscillation circuit, and the clear output signal is absent. When this occurs, the oscillator is started and its oscillation output is
A microcomputer reset circuit configured to be applied to the reset input of U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12755681U JPS5836448U (en) | 1981-08-28 | 1981-08-28 | Microcomputer reset circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12755681U JPS5836448U (en) | 1981-08-28 | 1981-08-28 | Microcomputer reset circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5836448U true JPS5836448U (en) | 1983-03-09 |
| JPS6225794Y2 JPS6225794Y2 (en) | 1987-07-01 |
Family
ID=29921281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12755681U Granted JPS5836448U (en) | 1981-08-28 | 1981-08-28 | Microcomputer reset circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5836448U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58191053A (en) * | 1982-05-01 | 1983-11-08 | Diesel Kiki Co Ltd | Resetting circuit of microcomputer |
| JPS6443461U (en) * | 1987-09-11 | 1989-03-15 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5169975A (en) * | 1974-12-13 | 1976-06-17 | Sharp Kk | |
| JPS5557956A (en) * | 1978-10-25 | 1980-04-30 | Nissan Motor Co Ltd | Malfunction prevention unit of microcomputer |
-
1981
- 1981-08-28 JP JP12755681U patent/JPS5836448U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5169975A (en) * | 1974-12-13 | 1976-06-17 | Sharp Kk | |
| JPS5557956A (en) * | 1978-10-25 | 1980-04-30 | Nissan Motor Co Ltd | Malfunction prevention unit of microcomputer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58191053A (en) * | 1982-05-01 | 1983-11-08 | Diesel Kiki Co Ltd | Resetting circuit of microcomputer |
| JPS6443461U (en) * | 1987-09-11 | 1989-03-15 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6225794Y2 (en) | 1987-07-01 |
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